1:(3 - 7) × (5 - 11)2:(5 - 11) × (3 - 7)3:(11 - 5) × (7 - 3)4:(11 × 7 - 5) ÷ 35:((11 × 7) - 5) ÷ 36:(7 - 3) × (11 - 5)7:(7 × 11 - 5) ÷ 38:((7 × 11) - 5) ÷ 3